Universal liquid crystal adaptive aberration correcting retina imaging system

A technology of liquid crystal self-adaption and aberration correction, which can be used in applications, medical science, ophthalmoscope, etc., and can solve the problem of insufficient imaging clarity

Inactive Publication Date: 2010-08-04
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Many research groups use concave lenses to compensate the defocus aberration of myopic eyes, and cylindrical lenses to compensate astigmatism aberrations of astigmatism eyes, but the imaging clarity is still not high enough, indicating that with the increase of the refractive error of the human eye, High-order aberrations are also becoming more serious. To solve this problem, it is necessary to increase the resolution of the detector and corrector at the same time.

Method used

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  • Universal liquid crystal adaptive aberration correcting retina imaging system
  • Universal liquid crystal adaptive aberration correcting retina imaging system
  • Universal liquid crystal adaptive aberration correcting retina imaging system

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Embodiment Construction

[0030] 1) Use a 3.5-inch TFT-LCD screen with a pixel size of 300 μm, and place a narrow-band filter of 510nm to 550nm in front, so that the central wavelength of light emission λ' is 530nm, and drive the LCD screen to display a 1.5mm "E" as the visual mark light source 1.

[0031] 2) The illumination source 8 used is a small semiconductor laser with fiber coupling, the core diameter is 100 μm, the emission wavelength λ is 808 nm, and the output power is adjustable in the range of 10 mW to 20 mW.

[0032] 3) The first lens 2, the second lens 3, the third lens 5, the fourth lens 9, the fifth lens 11, the sixth lens 14, the seventh lens 17, and the eighth lens 20 are double cemented achromatic lenses, and The surface is coated with anti-reflection coating. The calibers are: 20mm, 25mm, 25mm, 10mm, 20mm, 40mm, 20mm, 20mm; the focal lengths are: 150mm, 250mm, 200mm, 30mm, 50mm, 250mm, 86mm, 100mm.

[0033] 4) Select the human eye 7 as 200-degree astigmatism and 200-degree myopia,...

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Abstract

The invention belongs to the technical field of microscope imaging, relates to a high-order aberration correcting optical design for high-ametropia human eyes, and discloses a universal liquid crystal adaptive aberration correcting retina imaging system. An LCD screen is adopted for displaying a sighting target point light source, and the sighting target is designed into an E shape so that the self-adjusting effect of visibility is enhanced; and meanwhile, E-shaped micro displacement is easily controlled on the LCD screen so that the position of an imaging area can be quantitatively changed. Through the sign of a plurality of key devices, the universality of the liquid crystal adaptive system in fundus imaging is improved, the problem of difficult clear imaging of the fundus adaptive imaging technology under the condition of over 800-degree myopia or 200-degree astigmatism can be solved, and the system can acquire a high-resolution retina image on the human eye of 200-degree astigmatism.

Description

technical field [0001] The invention belongs to the technical field of microscopic imaging, and relates to the high-order aberration correction optical design of highly ametropic human eyes, in particular to a universal liquid crystal adaptive aberration correction retinal imaging system, which can solve the problem of fundus adaptive imaging The technology is difficult to clearly image under the condition of myopia above 800 degrees or astigmatism of 200 degrees. Background technique [0002] The blood vessels on the retina are the only small blood vessels that can be directly seen in the human body. They belong to the terminal vascular system. Any pathological damage and vascular obstruction can lead to tissue hypoxia, necrosis or rupture and leakage. Therefore, fundus changes are manifestations of systemic diseases. Clinical ophthalmoscopes are often used to observe changes in fundus capillaries to judge pathological changes, such as cardiovascular and cerebrovascular and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/15A61B3/12
Inventor 宣丽穆全全曹召良李抄胡立发彭增辉刘永刚李大禹鲁兴海
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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